diff --git a/packages/analyzer/package.json b/packages/analyzer/package.json
index 34973ff09..d9c414965 100644
--- a/packages/analyzer/package.json
+++ b/packages/analyzer/package.json
@@ -23,13 +23,13 @@
     "release": "npm run compile",
     "lint": "gulp lint",
     "tslint": "tslint -p .",
-    "test": "npm run clean && npm run build && npm run lint && mocha",
-    "quicktest": "export QUICK_TESTS=true; npm run build && mocha",
+    "test": "npm run clean && npm run build && npm run lint && mocha \"lib/test/**/*_test.js\"",
+    "quicktest": "export QUICK_TESTS=true; npm run build && mocha \"lib/test/**/*_test.js\"",
     "initBench": "if [ ! -d bower_components ]; then bower install -s -f PolymerElements/app-elements PolymerElements/iron-elements PolymerElements/gold-elements PolymerElements/paper-elements PolymerElements/neon-elements GoogleWebComponents/google-web-components ; fi",
     "benchmark": "npm run build && npm run initBench && node --expose-gc lib/perf/parse-all-benchmark.js",
-    "test:unit": "mocha",
-    "test:watch": "tsc-then -- mocha -c",
-    "format": "find src test | grep '\\.js$\\|\\.ts$' | xargs clang-format --style=file -i",
+    "test:unit": "mocha \"lib/test/**/*_test.js\"",
+    "test:watch": "tsc-then -- mocha \"lib/test/**/*_test.js\"",
+    "format": "find src test | grep \"\\.js$\\|\\.ts$\" | xargs clang-format --style=file -i",
     "prepublishOnly": "tsc && npm test"
   },
   "devDependencies": {
diff --git a/packages/analyzer/test/mocha.opts b/packages/analyzer/test/mocha.opts
index 97032c0da..64a50a639 100644
--- a/packages/analyzer/test/mocha.opts
+++ b/packages/analyzer/test/mocha.opts
@@ -1,4 +1,4 @@
 --ui tdd
+--colors
 --require source-map-support/register
 --timeout 5000
-lib/test/**/*_test.js
diff --git a/packages/browser-capabilities/package.json b/packages/browser-capabilities/package.json
index 2fd1dc1a9..f37190755 100644
--- a/packages/browser-capabilities/package.json
+++ b/packages/browser-capabilities/package.json
@@ -13,9 +13,9 @@
   "scripts": {
     "build": "rm -Rf lib/ && tsc",
     "build:watch": "tsc --watch",
-    "format": "find src -name '*.ts' | xargs clang-format --style=file -i",
-    "test": "npm run build && mocha",
-    "test:unit": "mocha",
+    "format": "find src -name \"*.ts\" | xargs clang-format --style=file -i",
+    "test": "npm run build && mocha \"lib/test/**/*_test.js\"",
+    "test:unit": "mocha \"lib/test/**/*_test.js\"",
     "test:watch": "watchy -w src -- npm run test"
   },
   "devDependencies": {
diff --git a/packages/browser-capabilities/test/mocha.opts b/packages/browser-capabilities/test/mocha.opts
index 97032c0da..64a50a639 100644
--- a/packages/browser-capabilities/test/mocha.opts
+++ b/packages/browser-capabilities/test/mocha.opts
@@ -1,4 +1,4 @@
 --ui tdd
+--colors
 --require source-map-support/register
 --timeout 5000
-lib/test/**/*_test.js
diff --git a/packages/build/package.json b/packages/build/package.json
index 0689f705b..1e2a90ab3 100644
--- a/packages/build/package.json
+++ b/packages/build/package.json
@@ -8,10 +8,10 @@
     "lint": "gulp lint",
     "build": "gulp build",
     "test": "gulp lint test",
-    "test:unit": "gulp test:unit",
-    "test:watch": "tsc-then -- mocha -c",
+    "test:unit": "mocha \"lib/test/**/*_test.js\"",
+    "test:watch": "tsc-then -- mocha \"lib/test/**/*_test.js\"",
     "prepublishOnly": "npm test",
-    "format": "find src/ -iname '*.ts' -o -iname '*.js' | xargs clang-format --style=file -i"
+    "format": "find src/ -iname \"*.ts\" -o -iname \"*.js\" | xargs clang-format --style=file -i"
   },
   "repository": {
     "type": "git",
diff --git a/packages/build/test/mocha.opts b/packages/build/test/mocha.opts
index 97032c0da..64a50a639 100644
--- a/packages/build/test/mocha.opts
+++ b/packages/build/test/mocha.opts
@@ -1,4 +1,4 @@
 --ui tdd
+--colors
 --require source-map-support/register
 --timeout 5000
-lib/test/**/*_test.js
diff --git a/packages/bundler/package.json b/packages/bundler/package.json
index 8dc8c844f..b2752719e 100644
--- a/packages/bundler/package.json
+++ b/packages/bundler/package.json
@@ -55,10 +55,10 @@
   },
   "scripts": {
     "build": "tsc",
-    "format": "find src | grep '\\.js$\\|\\.ts$' | xargs ./node_modules/.bin/clang-format --style=file -i",
-    "test": "npm run build && tslint -c tslint.json src/*.ts src/**/*.ts && mocha",
-    "test:unit": "mocha",
-    "test:watch": "tsc-then -- mocha"
+    "format": "find src | grep \"\\.js$\\|\\.ts$\" | xargs ./node_modules/.bin/clang-format --style=file -i",
+    "test": "npm run build && tslint -c tslint.json \"src/**/*.ts\" && mocha \"lib/test/**/*_test.js\"",
+    "test:unit": "mocha \"lib/test/**/*_test.js\"",
+    "test:watch": "tsc-then -- mocha \"lib/test/**/*_test.js\""
   },
   "author": "The Polymer Project Authors",
   "license": "BSD-3-Clause",
diff --git a/packages/bundler/test/mocha.opts b/packages/bundler/test/mocha.opts
index 867b4ed6f..05962f5da 100644
--- a/packages/bundler/test/mocha.opts
+++ b/packages/bundler/test/mocha.opts
@@ -1,4 +1,4 @@
 --ui tdd
+--colors
 --require source-map-support/register
 --timeout 20000
-lib/test
diff --git a/packages/cli/package.json b/packages/cli/package.json
index 24f27e2de..828376290 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -15,10 +15,10 @@
     "test": "gulp test lint",
     "test:smoke": "gulp test",
     "test:smoke-lint": "gulp test lint",
-    "test:integration": "gulp test:integration",
-    "test:unit": "gulp test:unit",
-    "format": "find src gulpfile.js \\( -iname '*.ts' -o -iname '*.js' \\) -not -path '*fixtures*' | xargs clang-format --style=file -i",
-    "test:watch": "tsc-then -- mocha -c --ui tdd lib/test/integration/*_test.js lib/test/unit/*_test.js lib/test/unit/*/*_test.js"
+    "test:integration": "mocha \"lib/test/integration/**/*_test.js\"",
+    "test:unit": "mocha \"lib/test/unit/**/*_test.js\"",
+    "format": "find src gulpfile.js \\( -iname \"*.ts\" -o -iname \"*.js\" \\) -not -path \"*fixtures*\" | xargs clang-format --style=file -i",
+    "test:watch": "tsc-then -- mocha \"lib/test/**/*_test.js\""
   },
   "repository": {
     "type": "git",
diff --git a/packages/cli/test/mocha.opts b/packages/cli/test/mocha.opts
index 4f179a309..64a50a639 100644
--- a/packages/cli/test/mocha.opts
+++ b/packages/cli/test/mocha.opts
@@ -1,4 +1,4 @@
 --ui tdd
+--colors
 --require source-map-support/register
 --timeout 5000
-
diff --git a/packages/editor-service/package.json b/packages/editor-service/package.json
index 9475d8c5f..cfb1c21d8 100644
--- a/packages/editor-service/package.json
+++ b/packages/editor-service/package.json
@@ -17,10 +17,10 @@
     "build": "tsc",
     "prepublishOnly": "npm run clean && npm run build",
     "lint": "tslint --project ./tsconfig.json",
-    "test": "npm run clean && npm run build && mocha && npm run lint",
-    "test:unit": "mocha",
-    "test:watch": "tsc-then -- mocha",
-    "format": "find src test | grep '\\.js$\\|\\.ts$' | xargs ./node_modules/.bin/clang-format --style=file -i"
+    "test": "npm run clean && npm run build && mocha \"lib/test/**/*_test.js\" && npm run lint",
+    "test:unit": "mocha \"lib/test/**/*_test.js\"",
+    "test:watch": "tsc-then -- mocha \"lib/test/**/*_test.js\"",
+    "format": "find src test | grep \"\\.js$\\|\\.ts$\" | xargs ./node_modules/.bin/clang-format --style=file -i"
   },
   "devDependencies": {
     "@types/chai": "=4.0.5",
diff --git a/packages/editor-service/test/mocha.opts b/packages/editor-service/test/mocha.opts
index 89240f395..46f5f3754 100644
--- a/packages/editor-service/test/mocha.opts
+++ b/packages/editor-service/test/mocha.opts
@@ -1,5 +1,5 @@
 --ui tdd
+--colors
 --require source-map-support/register
 --retries 3
 --timeout 5000
-lib/test/*_test.js lib/test/**/*_test.js
diff --git a/packages/linter/package.json b/packages/linter/package.json
index c9dd4b250..25c3c5836 100644
--- a/packages/linter/package.json
+++ b/packages/linter/package.json
@@ -46,9 +46,9 @@
     "clean": "touch lib && rm -rf lib && mkdir lib",
     "format": "find src | grep \"\\.[jt]s$\" | xargs clang-format --style=file -i",
     "lint": "tslint -c tslint.json src/*.ts src/**/*.ts",
-    "test": "npm run build && mocha && npm run lint",
-    "test:unit": "mocha",
-    "test:watch": "tsc-then -- mocha",
+    "test": "npm run build && mocha \"lib/test/**/*_test.js\" && npm run lint",
+    "test:unit": "mocha \"lib/test/**/*_test.js\"",
+    "test:watch": "tsc-then -- mocha \"lib/test/**/*_test.js\"",
     "run-on-polymer": "npm run build && (cd test/integration && bower install --silent) && INTEGRATION_TEST=true mocha lib/test/integration_test.js"
   },
   "repository": {
diff --git a/packages/linter/test/mocha.opts b/packages/linter/test/mocha.opts
index d91b4b17c..8c6d7ac8e 100644
--- a/packages/linter/test/mocha.opts
+++ b/packages/linter/test/mocha.opts
@@ -1,4 +1,3 @@
--c 
 --ui tdd
+--colors 
 --timeout 5000
-lib/test/*.js lib/test/**/*.js
diff --git a/packages/polyserve/package.json b/packages/polyserve/package.json
index 55d07e1e6..cedd8f862 100644
--- a/packages/polyserve/package.json
+++ b/packages/polyserve/package.json
@@ -12,10 +12,10 @@
     "start": "./bin/polyserve",
     "clean": "rimraf lib",
     "build": "npm run clean && tsc",
-    "test": "npm run build && mocha && tslint \"src/**/*.ts\"",
-    "test:unit": "mocha",
-    "test:watch": "tsc-then -- mocha -c",
-    "format": "find src test -iname '*.ts' | xargs clang-format --style=file -i"
+    "test": "npm run build && mocha \"lib/test/**/*_test.js\" && tslint \"src/**/*.ts\"",
+    "test:unit": "mocha \"lib/test/**/*_test.js\"",
+    "test:watch": "tsc-then -- mocha \"lib/test/**/*_test.js\"",
+    "format": "find src test -iname \"*.ts\" | xargs clang-format --style=file -i"
   },
   "keywords": [
     "polymer",
diff --git a/packages/polyserve/test/mocha.opts b/packages/polyserve/test/mocha.opts
index 3a654bee7..64a50a639 100644
--- a/packages/polyserve/test/mocha.opts
+++ b/packages/polyserve/test/mocha.opts
@@ -1,4 +1,4 @@
 --ui tdd
+--colors
 --require source-map-support/register
 --timeout 5000
-lib/test/*_test.js lib/test/**/*_test.js
diff --git a/packages/project-config/package-lock.json b/packages/project-config/package-lock.json
index c6a577905..556b2ae21 100644
--- a/packages/project-config/package-lock.json
+++ b/packages/project-config/package-lock.json
@@ -91,6 +91,11 @@
 			"resolved": "https://registry.npmjs.org/browser-stdout/-/browser-stdout-1.3.0.tgz",
 			"integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8="
 		},
+		"buffer-from": {
+			"version": "1.0.0",
+			"resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.0.0.tgz",
+			"integrity": "sha512-83apNb8KK0Se60UE1+4Ukbe3HbfELJ6UlI4ldtOGs7So4KD26orJM8hIY9lxdzP+UpItH1Yh/Y8GUvNFWFFRxA=="
+		},
 		"builtin-modules": {
 			"version": "1.1.1",
 			"resolved": "https://registry.npmjs.org/builtin-modules/-/builtin-modules-1.1.1.tgz",
@@ -720,6 +725,20 @@
 			"resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
 			"integrity": "sha1-BF+XgtARrppoA93TgrJDkrPYkPc="
 		},
+		"source-map": {
+			"version": "0.6.1",
+			"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
+			"integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g=="
+		},
+		"source-map-support": {
+			"version": "0.5.5",
+			"resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.5.tgz",
+			"integrity": "sha512-mR7/Nd5l1z6g99010shcXJiNEaf3fEtmLhRB/sBcQVJGodcHCULPp2y4Sfa43Kv2zq7T+Izmfp/WHCR6dYkQCA==",
+			"requires": {
+				"buffer-from": "1.0.0",
+				"source-map": "0.6.1"
+			}
+		},
 		"spdx-correct": {
 			"version": "3.0.0",
 			"resolved": "https://registry.npmjs.org/spdx-correct/-/spdx-correct-3.0.0.tgz",
diff --git a/packages/project-config/package.json b/packages/project-config/package.json
index a4cc2f3ac..98ec8a803 100644
--- a/packages/project-config/package.json
+++ b/packages/project-config/package.json
@@ -16,9 +16,9 @@
   "homepage": "https://github.com/Polymer/polymer-project-config#readme",
   "scripts": {
     "build": "tsc && typescript-json-schema src/index.ts ProjectOptions --ignoreErrors -o lib/schema.json",
-    "test": "npm run build && mocha --ui tdd",
-    "test:unit": "mocha --ui tdd",
-    "format": "find src test \\( -iname '*.ts' -o -iname '*.js' \\) | xargs clang-format --style=file -i"
+    "test": "npm run build && mocha \"test/**/*_test.js\"",
+    "test:unit": "mocha \"test/**/*_test.js\"",
+    "format": "find src test \\( -iname \"*.ts\" -o -iname \"*.js\" \\) | xargs clang-format --style=file -i"
   },
   "dependencies": {
     "@types/node": "^9.6.4",
@@ -31,6 +31,7 @@
     "clang-format": "1.0.49",
     "mocha": "^3.0.2",
     "polymer-analyzer": "^3.0.0-pre.22",
+    "source-map-support": "^0.5.5",
     "tslint": "^5.9.1",
     "typescript": "^2.0.2",
     "typescript-json-schema": "^0.9.0"
diff --git a/packages/project-config/test/mocha.opts b/packages/project-config/test/mocha.opts
new file mode 100644
index 000000000..64a50a639
--- /dev/null
+++ b/packages/project-config/test/mocha.opts
@@ -0,0 +1,4 @@
+--ui tdd
+--colors
+--require source-map-support/register
+--timeout 5000
diff --git a/packages/web-component-tester/mocha.opts b/packages/web-component-tester/mocha.opts
new file mode 100644
index 000000000..64a50a639
--- /dev/null
+++ b/packages/web-component-tester/mocha.opts
@@ -0,0 +1,4 @@
+--ui tdd
+--colors
+--require source-map-support/register
+--timeout 5000
diff --git a/packages/web-component-tester/package.json b/packages/web-component-tester/package.json
index 8ff35123b..f97af4e22 100644
--- a/packages/web-component-tester/package.json
+++ b/packages/web-component-tester/package.json
@@ -49,10 +49,10 @@
     "build": "tsc && gulp build",
     "test": "tsc && gulp test",
     "prepublishOnly": "gulp prepublish",
-    "test:unit": "gulp test:unit",
-    "test:integration": "gulp test:integration",
-    "test:watch": "watch 'gulp test:unit' runner/ browser/ bin/ test/ tasks/",
-    "format": "find runner test | grep '\\.js$\\|\\.ts$' | xargs ./node_modules/.bin/clang-format --style=file -i"
+    "test:unit": "mocha \"test/unit/**/*.js\"",
+    "test:integration": "gulp bower && mocha \"test/integration/**/*.js\" --timeout 90000",
+    "test:watch": "watch \"mocha \\\"test/unit/**/*.js\\\"\" runner/ browser/ bin/ test/ tasks/",
+    "format": "find runner test | grep \"\\.js$\\|\\.ts$\" | xargs ./node_modules/.bin/clang-format --style=file -i"
   },
   "dependencies": {
     "@polymer/sinonjs": "^1.14.1",
@@ -126,6 +126,7 @@
     "rimraf": "^2.5.4",
     "rollup": "^0.25.1",
     "run-sequence": "^1.0.1",
+    "source-map-support": "^0.5.4",
     "tslint": "^5.9.1",
     "typescript": "^2.1.4",
     "watch": "^0.18.0",
diff --git a/packages/web-component-tester/test/mocha.opts b/packages/web-component-tester/test/mocha.opts
new file mode 100644
index 000000000..64a50a639
--- /dev/null
+++ b/packages/web-component-tester/test/mocha.opts
@@ -0,0 +1,4 @@
+--ui tdd
+--colors
+--require source-map-support/register
+--timeout 5000